Using This Components -
5v Relay - https://amzn.to/3goDVJu
9v Battery - https://amzn.to/3wlU3nM
Key Switch & Key - https://amzn.to/3w8wkWn
Bulb - near electric shop
Connctor pin and bulb holder - near electric shop
Circuit Diagram -
How to make electrical key switch
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